Apple has quietly launched two new weekly promotions/sub-categories on the App Store: Free App of the Week and Editors’ Choice. The former – as the name implies – features an app that will go free for an entire week, and Cut the Rope: Experiments for the iPhone (as $0.99) and iPad (was $1.99) is the promo’s very first selection (Apple tweeted CtR: Experiments as their #FreeAppoftheWeek). The latter meanwhile, has replaced the weekly feature formerly known as the iPhone and iPad App of the Week. This week’s selections are Extreme Skater and Facebook Camera for the iPhone and SketchBook Ink and Air Mail for the iPad.

As for the Mac App Store, while there doesn’t appear to a Free App of the Week up for grabs, there are two current Editors’ Choice Mac apps: Deus Ex: Human Revolution and Cobook. Be sure to grab the excellent Cut the Rope: Experiments now for your iDevice(s).